<?php if(theme_options("mobile-qrcode")){?>
    <img src="<?php echo theme_options('mobile-qrcode'); ?>" alt="手机访问" />
    <?php } else { ?>
        <span>
            <a target="_blank" href="<?php bloginfo('url'); ?>/wp-admin/themes.php?page=theme-options.php">
                请点此跳转到后台主题设置处添加您的手机访问二维码
            </a>
    </span>
<?php } ?>